One thing I do know: one of the most recent additions to my collection features one certain future HOF'er, as well as a current player who is quietly building a HOF resume. Both are third basemen (along with two others who manned the corner).
1997 Bowman's Best Mirror Image #MI9
I was never a big fan of the Bowman's Best base cards (I viewed it as a poor man's version of Topps Finest); I was a fan of the insert sets found in them, however. One of the best being Mirror Image.
Beltre already ranks as one of the top defensive third basemen of all-time and, though his power numbers have slipped in recent years, has continued to be a productive player at the plate.